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9 September, 23:46

How much work will a machine with a power rating of 1.1 * 103 watts do in 2.0 hours?

A. 1.5 * 106 joules

B. 2.1 * 106 joules

C. 4.0 * 106 joules

D. 8.1 * 106 joules

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Answers (2)
  1. 9 September, 23:56
    0
    7.92*10^6Joules

    Explanation:

    Power is defined as the rate of change in work done. Mathematically, Power = Workdone/Time

    Given power = 1.1*10³watts

    Time = 2.0hours = 2*60*60

    = 7,200seconds

    Workdone = power * time

    Work done = 1.1*10³*7200

    Workdone = 7,920,000Joules

    = 7.92*10^6Joules
  2. 10 September, 01:42
    0
    D.

    Explanation:

    8.1X10 to the power of 6 Joules.
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